Start by choosing a small number of projects that represent the type of work you want to do. Quality and relevance matter more than filling a page with everything you have ever attempted.
For each project, include a short problem statement, your role, the process, tools or skills used, and the final output. Where possible, add links, screenshots, repositories, reports, or other evidence that a reviewer can inspect.
Do not hide limitations. If a project was a training assignment, say so. If you worked as part of a team, identify your contribution. Clear attribution protects credibility.
Your portfolio should evolve as your work improves. Replace weaker projects with stronger ones rather than allowing the site to become an archive of every exercise.